"Developing Management Skills" David A. Whetten and kim S. Cameron. Harper Collins, 5th Edition ,(May 22,2001)

"Becoming A Master Manager: A Competency Framework." Robert. E.Quinn, et, al. John Wiley & Son, 2nd Edition ,(Dec 1995)

"The Empowered Manager" Political Skills At Work" Peter Black Jossey-Bass. Reprint Edition ,(March 8,1991)